first i tried to establish a certificate for my imap.my.domain mail.my.domain and smpt.my.domain using a pattern from a website via copy and paste. Unfortunately, in my hast I have forgotten to replace the domian with my own one. I therefor always got a message like “error the domain ends not of a public addr.” After only three attempts I have recognized the mistake and replaced the donain with the rigth one. But to late it allready
produced the error “There where too many requests…”. After that i treid it again with cert bot -apache" and additionaly with -froce -renew. Of couse with the same unlucky results. Is there any way or chance for me to fix the miss i have made? And if, can i do the certyficate verification for apache and postfix with a singel command? As you have allready notiesed , I am not skilled at all! Thank you for your time and help.

first i tried to establish a certificate for my imap.my.domain mail.my.domain and smpt.my.domain using a pattern from a website via copy and paste. Unfortunately, in my hast I have forgotten to replace the domian with my own one. I therefor always got a message like “error the domain ends not of a public addr.” After only three attempts I have recognized the mistake and replaced the donain with the rigth one. But to late it allready
produced the error “There where too many requests…”. After that i treid it again with cert bot -apache" and additionaly with -froce -renew. Of couse with the same unlucky results. Is there any way or chance for me to fix the miss i have made? And if, can i do the certyficate verification for apache and postfix with a singel command? As you have allready notiesed , I am not skilled at all! Thank you for your time and help.

There are several different issues here, so let me try to explain all of them:

too many requests: this problem is just as it says, but whenever you see that it will go away in just one hour.

too many certificates already issued for serverprofi24.de: is this your own domain or the domain of a hosting provider? Let’s Encrypt has limits on how many certificates it will issue per week for subdomains of an individual domain.

issuing all of your subdomains in one Certbot command: yes, you can issue a certificate for multiple domains and subdomains with Certbot by listing them all with -d options in your command line. For example certbot --apache -d agital.de -d www.agital.de -d mail.euve264659.serverpfi24.de -d smtp.euve264659.serverprofit24.de and so on. In this case all of these names will be listed in the single resulting certificate and it will be valid for any of them.